Margin bar for hektograph machines



June 24, i930.

v.1. P. PEDERSQN MARGIIN BAR FOR HEKTOGRAPH MCHINES Filed Aug. 15, 1929 Patented .lune 24, Y1930 Unirse s'rares ijmassz PATENT QFFICE JOI-IN I?. PEDERSON, F CHICAGO, ILLINOIS, ASSIG-NOR TO DIT'IO, INCORPORATED, 0F.

CHICAGO, ILLINOIS, A CORPORATION .OF WEST VIRGINIA MARGIN BAR FOB I-IEKTOGRAPH MACHINES Application led August 15, 1929. Serial No. 386,164.

The invention relates to improvements in duplicating machines of the type employing a gelatine matrix adapted to receive negative or reverse impressions and roller means on a platen carriage for pressing a master or copy sheet thereupon to communicate and receive the impression, and has reference more particularly to improved means for ac` curately positioning and aligning the sheets in regard to the gelatine matrix and platen carriage.

Duplicating machines of the type commonly known as hektograph machines are used extensively in office work wherein it is desired to secure a number of duplicates of a master copy, and are equally eflicient in operation in the rendering of duplicate copies where the master copy, for example, comprises a time sheet of the maximum size of 2o the machine, or a gas or electric light bill of consequently reduced size. In the use of hektograph machines in billing, as in duplicating a gas or electric light bill as abovementioned, the improvements of the present -invention are found to be of the utmost importance, although it is to be understood that the invention -is not limited to a specific use of the machine but will constitutestandard equipment on heltograph machines and will 3o be found equally efficient for whatever commercial use the machine may adapt itself.

In the operation of a heltograph machine a blank form is first inserted between rollers journaled in a platen carriage, wjlien the i bodiment of the'device and wherein like refercarriage is in its initial position.Y To align the blank form with the edge of the gelatine matrix over which the carriage is adapted to travel, and to afford an abutment or stop foi' facilitating the positioning` of the forms 4o or copy sheets, a margin bar is provided which extends transversely of the `machine and parallel with the edge of the matrix. It is, of course, understood that the master copy has been pressed on the matrix in that predetermined position relative to the edge thereof as will provide the desired margin on the edge of the copies by printing the copies with their edges positionec by the margin bar. The platen carriage, when worked Se forward, feeds'the copysheetsfthrougli the rollers and impresses thereon the printed matter from the gelatine surface of the matrix. To remove and eject the printed copiesfrom the rollers, it is only necessary that the carriage be returnedtoits initial position.V However, in practice, it has "been found that the carriage is often worked forward so far that the printed copy is lost fromv the rollers and remains in adhesion with the surface of the matrix. It is, therefore, one of theV objects of the present invention to provide a margin bar for use in duplicating machines which will facilitate the stripping ofthe printed copies from the-surfaceI ofthe matrix by the hand of the operator, without removing' the margin bar from its operating position.

It is a further object of the 'present invention to providey a margin bar combiningthe features above-mentioned and means for positioning and straightening the blank form with the edge of the matrix after insertion between the rollers.

A further object of the invention is to` .as will be more fully described and particularly' pointed out in the specification, drawings and claims appended hereto.

In the drawings, which illustrate an em- Referring to the drawings, it kwill be noted matthew-@sent finvenitonisillustrated-esem bodied in a machine having members 10 constituting the frame upon which the machine proper is mounted, having a tie rod 12 for securing and spacing the side members so that the frame is united into a rigid structure. A spindle 14 is provided, journaled in suitable bearings in the side members 10, on which the gelatine duplicating matrix or band 1S is wound, forming the cylindrical roll 16. The band or matrix is fed over the fiat platen 20 to provide an exposed surface of the gelatine band of sufficient size forthe printing operation. The gelatine band 18 is fed in such manner that successive portions of the band are exposed, and is then wound on the opposite spindle, not shown, at the other end of the machine, which is similar to the spindle 14 and which is likewise journaled between the side members 10 of the frame. Mounted on the top of the side members 10 so that it 'is free to travel over the upper surface of the fiat platen 20, is a carriage member 22 which has journaled therein the transverse rollers 24 and 26.

In the operation of the machine, after the gelatine band has been stretched over the platen 2O to expose part of its surface, a master copy 28 is inserted between the rollers 24 and 26 and is pressed upon the gelatine surface by the roller 24. In order to effect this operation means are provided which are not here shown for moving the rollers 24 and 26 relative to each other whereby, when the copy sheets are introduced, they may be disposed adequately spaced to permit the sheet to pass Vbetween them, and then moved in contacting relation to tightly grip the sheet for feeding the sheet inwardly and outwardly as required in operation. Such means, however, per se, constitute no part of the present invention and accordingly are not shown or described in detail here.

As the carriage 22 is worked forward, successive portions of the copy are pressed upon `the gelatine surface until the impression is complete. Thereafter the copy is removed by returning the carriage to its initial position. To facilitate the insertion of the copy 28 between the rollers and to straighten and align the copy with the forward edge of the gelatine matrix, the improved margin bar comprising the present invention has been de signed, and consists of an integral bar 30 (Figure l) of any suitable metal which, in its forming process, lends itself with ease to both cutting and shearing operations. This bar is preferably bent into right angled shape to form the upper ledge 32 and the depending ledge 34. For ournaling the bar between the side members 10 angle brackets 36 are provided, perforated at 38 for pivotal engagement with the bolts 39 and securely fastened to the respective ends of the depending ledge at 40 by any suitable means. A positionjing stop 42 is located in each side member for positioning the margin bar 30 with respect to the top surface of the matrix, where it is in a position to receive the forward edge of the sheet 28 after insertion through the rollers.

The margin bar 30 is provided with paper stop devices or lugs 44 and apertures 46. rlhe lugs 44 comprise bent up porti-ons of the metal from the upper ledge 32 and are formed by slitting the metal along the three edges or boundaries of the lug, after its correct size has been determined, and by bending outwardly the free portion of the metal. The apertures 46 are formed by a shearing process wherein a portion of the margin bar is sheared along four edges, and the confined portion is liberated leaving the apertures 46. rEhe above pr-ocess gives rise to several advantages in the manufacture of margin bars since the bar can be constructed from a flat strip of metal by first shearing the strip to form the apertures, slitting the strip in places desired to free the portion forming the lugs, and bending the lugs outward into upstanding form, and then bending the entire strip to form the completed right angled bar. rThis results in simplicity of construction, and yet insures a rigid bar having integral parts.

1n the modified form of margin bar 130 shown in Figure 2, the same shearing and slitting operations are employed to form the apertures 146 and the upstandlng lugs 144 as are used in the construction of the margin bar shown in Figure 1. rlhe bar 130, however, comprises a fiat strip of metal having integral therewith at each end the bracket members 136 bent and shaped similar to the brackets 36 in use with the margin bar 30. rlhe brackets 136 are also provided with bent ears 142 which function as positioning means for the bar when in operati-on. These ears are bent outward from the bracket members so that they will contact and rest on the top edge of the respective side members 10 of the machine. The bar is therefore held in its right position in relation to the matrix which allows the stops 42 in the side members to be omitted. llt is to be understood that the bracket members 36 used with the margin bar 30 need not be constructed as separate members but may be formed integral with the bar in much the saine manner as the brackets 136 are formed integral with the bar 130.

Upon inspection of Figures 1 and 2 it will be seen that the apertures 46 in the margin bar 30, and the apertures 146 in bar 130 are disposed in set relation to the upstanding lugs on each bar so that their centers may be joined by a line substantially coinciding with a plane joining the rear surface of the upstanding lugs. This relation of the apertures and lugs will locate the latter to the rear of the front edge of the apertures so that in the operation of a machine using the margin bars the copy sheet, when inserted between the rollers, will abut the upstanding lugs, as is clearly shown in Figure 3, and will overlap or cover the apertures to the front of the upstanding lugs. This construction will allow that portion of the copy sheet disposed over the aperture to be free and accessible so that it may be gripped by the operator of' the machine merely by the insertion of his thumb and oreinger into the aperture. To facilitate this operation, the rear portions of the apertures 46 in the bar 30 are located along the radius of the bar so that a part 48 depends into the ledge 84, thereby allowing easy access for the fingers of the operator. The same idea is carried out in the construction of the bar 130, but in a somewhat different form due to the entire flat surface presented by this modification. It is accomplished by forming the rear edges of the apertures 146 on an incline as shown at 148.

It is to be understood that I do not wish to be limited by the exact embodiment of the device shown, which is merely by way of illustration and not limitation, as various and other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim- 1. In a duplicator, the combination with a frame, having duplicated means and a carriage mounted to travel thereover, of a margin bar comprising a strip of metal, apertures formed in said strip at spaced intervals, lugs formed integral with said strip adjacent the apertures, and bracket members secured to the respective ends of said strip for pivoting the bar in said frame.

2. In a duplicator, the combination with a frame, having duplicating means and a carriage mounted to travel thereover, of a margin bar pivotally secured in said frame, comprising a strip of metal having apertures formed therein and lugs integral therewith,`

whereby master and copy sheets are positioned by contact with said lugs and removed by access through said aperatures.

3. In a duplicator, the combination with a frame, having duplicating means and a carriage mounted to travel thereover, of a margin bar comprising a strip of metal having openings Jformed therein and lugs integral therewith, and bracket members for pivotally securing said bar in said frame.

4. In a duplicator, the combination with a frame, having duplicating means and a carriage mounted to travel thereover, of a margin bar pivotally secured in said frame, comprising a strip of metal having lugs formed integral therewith, and apertures spaced adjacent the lugs to afford access to masterand copy sheets after positioning by said lugs.

5. In a duplicator, the combination with a frame, having duplicating means and a carriage mounted to travel thereover, of a margin bar comprising astrip of metal, paper sheeti stop devices-integral'with said strip, and aperturesspaced adjacentsaidvv stops for aording `access to' said .paperf sheets after positioning byl said stops. A i

6; In a machineof the class described, in combination with a paper sheet` supporting bed, a margin bar disposed at one edge of said bed, comprising a strip of metal, lugs formed on said strip, channel openings disposed in said strip adjacent said lugs, whereby an edge of a paper sheet will be exposed after positioning by said lugs.

7 In a machine of the class described, in combination with a paper sheet supporting bed, a margin bar disposed at one edge of said bed, comprising a strip of metal, means formed on said strip for positioning a paper sheet or the like on said bed, channel openings disposed in said strip adjacent said means, whereby an edge yof said paper will be exposed after positioning by said means.

S. In a duplicator, the combination with a frame having a bed and a duplicating film thereover, of a carriage mounted on said frame and having means adapted to depress a sheet of paper or the like onto said duplicating film, of a margin bar mounted on said frame and provided with means for allowing said sheet to be stripped from said duplicating film while said margin bar remains in its operative position.

9. In a duplicator, the combination with a frame having a bed and a duplicating lilm thereover, of a carriage mounted on said frame and having means adapted to depress a sheet of paper or the like onto said duplicating film, of a margin bar mounted on said frame and provided with openings, whereby said sheet may be stripped from said duplicating film while said margin bar remains in operative position, by insertion of the lingers of the operator into said openings.

l0. In a duplicating machine, the combination with a printing bed, and a platen carriage reciprocable thereover, of a margin bar at one end of the bed and adjacent thereto comprising a strip of metal bent to form a horizontal and vertical ledge, paper stop devices formed integrally with the horizontal ledge, apertures formed in said ledge adjacent the stop devices, whereby master and copy sheets are positioned on said printing bed by contact with said stop devices, and removed from said bed by access through said apertures.

11. In a duplicating machine, the combination with a printing bed, and a platen carriage reciprocable thereover, of a margin bar at one end of the bed and adjacent thereto comprising a strip of metal bent to form a horizontal and vertical ledge, paper stop devices formed integrally with said horizontal ledge, apertures formed in said strip along the bend therein and having portions extending into said4 horizontal and Vertical ledges respectively, whereby master and copy sheets are positioned on said printing bed by Contact with said stop devices, and removed from said bed by access through said apertures.

Signed at Chicago, Illinois, this 12th day of August, 1929.

' JOHN l?. PEDERSON. 

